The simple explanation is that many employers believe that. In fact I don't think it's that hard. 1. As another commenter pointed out, most jobs are in "at-wil

The simple explanation is that many employers believe that. In fact I don't think it's that hard. 1. As another commenter pointed out, most jobs are in "at-will" states. 2. Many companies require arbitration instead of litigation to settle any disputes as a requirement of employment. 3. It's just as expensive for the fired employee, probably more so, since if you litigate, you're unlikely to ever work again.